Acronyms: E

Acronym	Name
ERP	Eye reference point
ERP PDU	Echo replay protocol data unit
ERPDU	Error protocol data unit
ERQ PDU	Echo request protocol data unit
ERU	Engine replay unit
ES	End system
ES	Extended squitter
ES&H	Environmental Safety and Health
ESA	Eastern Service Area
ESA	European Space Agency
ESAI	Electronic standby attitude indicator
ESAS	Electronic situation awareness system
ESAS	Enhanced situational awareness system
ESC	Eastern Service Center
ESC	Enterprise Service Center
ESD	Electrostatic discharge
ESDS	Electrostatic discharge and soldering
ESEC	En Route Broadband Secondary Radar
ESF	Extended Superframe Format
ESH	End system hello
ESID	Engine and system indication display
ESIS	Electronic standby instrument system
ESIS	Engine and system indication system
ESIS	Enhanced Status Information System
ESIS	Environmental Safety Information System
ESM	Electronic support measures
ESOIC	Enhanced small-outline IC
ESP	En Route Sequencing Program
ESP	En Route Spacing Program
ESR	Equivalent-series resistance
ESRI	Environmental Systems Research Institute
ESS	Electronic switching system
ESS	Energy Storage System
ESS	Environmental stress screening
ESSD	Electrostatic sensitive devices
ESU	Environmental sensor unit
ESV	Expanded Service Volume
ESYS	En Route Equipment Systems
ETA	Estimated Time of Arrival
ETA	Estimated time of arrival
ETAS	Enhanced TRACON/tower automation system
ETB	End of block (ASCII/IA5 character)
ETB	Engineering test bed
ETC	Estimated time of completion
ETD	Estimated Time of Departure
ETD	Estimated time of departure
ETE	Estimated Time En Route
ETE	Estimated time enroute
ETG	Enhanced Target Generator
ETI	Elapsed time indicator
ETL	Effective Translational Lift
ETM	Elapsed time measurement
ETM	Electronic training manuals
ETMS	Engine-trend monitoring services
ETMS	Enhanced Traffic management Systems
ETMS	Enhanced traffic management system
ETN	Electronic Telecommunications Network
ETNO	European Telecommunications Network Operators
ETO	Engineering Technical Officer
ETOPS	Extended operations
ETOPS	Extended twin-engine operations
ETP	Equal time point (halfway there, by time)
ETRC	Expected taxi ramp clearances
ETS	Emission Trading Scheme
ETVCT	En Route Training Voice Communication Tool
ETVS	Enhanced terminal voice switch
ETX	End of transmission
EU	Electronic unit
EU	European Union
EUAFS	Enhanced upper air forecast system
EUPS	External uninterruptible power supply
EURATN	European ATN
EURET	European research on transport systems
EUROCAE	European Organization for Civil Aviation Equipment
EUROCAE	European Organization for Civil Aviation Equipment (European equivalent of RTCA)
EUROCONTROL	European Organization for the Safety of Air Navigation
EV	Earned value
EV	Electric Vehicle
EVAS	Enhanced Vortex Advisory System
EVCS	Emergency Voice Communications System
EVFR	Electronic Visual Flight Rules
EVM	Earned Value Management
EVM	Error vector magnitude
EVS	Enhanced vision system
EW	Electronic warfare
EWINS	Enhanced Weather Information System
EWIS	Electrical wiring interconnection system
EWR	Newark International Airport
EZAP	Enhanced zonal analysis procedures

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Acronyms: E